Estudio geotécnico in Sandiás

In Sandiás, the predominant subsoil is composed of highly hard overconsolidated clays and marls, together with a significant presence of sandstones, conglomerates and flysch. These soil types generally provide a good bearing capacity for shallow foundations, especially on the hard fractions, although it is essential to characterise local heterogeneity. The occasional presence of delta-origin silts and peats also stands out; these are materials with a very low load-bearing capacity that should be avoided as a support level due to their high compressibility and potential for settlement.

As regards seismic hazards, seismicity in Sandiás is moderate (10 events in 30 years, Mmax 2.9), which implies periodic monitoring but without major structural requirements. The non-clayey subsoil rules out issues associated with expansive soils, and there are no risks linked to karst. The main factor conditioning the geotechnical study in Sandiás lies in identifying and correctly zoning areas with silts and peats, which could compromise the stability of shallow foundations.